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Microphotographs of the EPCs incubated with different concentrations of Fe3O4@CA–CD34 [(A) 0 μg/mL; (B) 100 μg/mL; (C) 500 μg/mL] for 3 days. Cell viability of the EPCs incubated with the different concentration of Fe3O4@CA–CD34 for 1 and 3 d (D).
